All of AmCraft’s sealing services provide an airtight, fluid proof seam that fuses together a variety of material types. The process you’ll need depends on a number of factors: the material type used, the size and shape of the product, the volume of work needed, the appearance and strength of the seam, and the custom applications needed for product functionality.
Below are basic descriptions of the processes to help you determine which may work best for your application. Since we offer all of these sealing services at AmCraft, we can answer your questions and objectively determine which process will work best for your project.
When to use radio frequency (RF) welding
Radio Frequency Welding uses electromagnetic energy to fuse flexible, thermal materials together. Our RF Welding presses also utilize heat and pressure to produce sealed seams that offer the best quality seal in appearance and bond performance. RFW is used for large/oversized projects and for mass production of products that require the melding of different materials types. RFW also offers better control when using very thin materials and constructions with very close dimensional tolerances.
Is hot air / heat sealing superior?
Hot Air/Heat Sealing uses a nozzle to channel heated air between two layers of material. A heat seal is used when materials need to be configured into closed chamber/tube type constructions, complex (multiple plane) configurations or when using thicker material selections. This process is fast and allows for ‘continuous’ welding of materials or to form large curved constructions.
Another alternative: hot wedge sealing
Hot Wedge Sealing is used when the optimum material for your project is not radio frequency or ultrasonically weldable. Hot wedge sealing provides a much better fabrication system for close tolerances and/or accurately positioned voids in the weld. It also offers better control when using very thin materials and constructions with very close dimensional tolerances.
Solvent bonding / welding options
Solvent Bonding or Solvent Welding is a process in which the surfaces of the materials to be joined are treated with a solvent. The solvent temporarily softens the material and the bond is made by chemical reaction. As the solvent evaporates the two surfaces render a tight, permanent bond, commonly used for securing fill and vent tubes to closed chamber type constructions.